Baffle-wall form



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BAFFLE WALL FORM Filed Nov. 24. 1926 10 Sheets-Sheet 10 [7t V072 01 MCHAEL L/Pm/r y/ZJ/ ATTOENE Patented Oct. 18, 1927.

UNITED STATES PATENT OFFICE.

BAFFLE-WALE. FORM.

Application filed November 24, 1926.

This invention relates to a structure as a form for receiving, guiding and retaining wet concrete, which is particularly adapted for use in constructing baffle walls for boilers or furnaces, to form such a wall about a series of parallel tubes with the tubes embedded in the cement.

These battles are usually constructed of some expensive fire-proof material but nevertheless have to be frequently rebuilt or replaced, and the present invention is particularly adapted for use in new or replacement work, wherein a Wall of cement, or a portion of such a Wall, is to be constructed about the tubes.

Features of the invention include a Wallforming unit as trough-like element stamped or otherwise formed, from sheet material, and providing a linear series of filler openings, separated by narrow transverse portions of the material, acting as struts or braces. In some instances the braces are spaced in correspondence to the center spacing of the boiler tubes, and each unit further provides longitudinally disposed side portions as lateral retaining walls.

Other features of the invention relate to the sectional construction or arrangement of the cen'ient-retaining forms including the methods of placement of the units in interposed relation to the tubes to be embedded, and to units in combination with auxiliary wall-forming strips, flanking or overlying said units to provide substantially closed sides for the form.

Other features relate to the combination of the units and auxiliary strips with end and bottom forming timbers, to which the units and strips are in some instances terminally secured. The trough-like units provide means for bracing the form transversely between its walls, and a feature of the invention resides in the diagonal placement of a plurality of such units in such relation as to form substantially closed walls about the tubes.

Another feature relates to the use of closed bottom filling troughs as chutes adapted to be telescopically inserted Within the open bottomed trough-like unit, to facilitate the introduction and distribution of cement through the filler openings, to position between the tubes. Other features relate to the method of arranging the auxiliary strips relative to the trough-like ele- Serial No. 150,471.

ment either at inner or outer sides thereof, or interlaced therewith.

Objects, advantages and other features wil l be f'ufly set forth in the description of the drawings forming part of the specification, in which drawings;

Figure 1 shows a series of tubes, having trough like bracing members horizontally disposed, and auxiliary diagonal strips disposed at the inner side;

Figure" 2 is a plain section showing the central relation of the transverse spacing andbracing strips to the tubes;

Figure 3 is a detail vertical cross section;

Figure 4 shows how the form can be applied for reconstructing a portion of a battle wall, or for building the same in sections;

Figure 5 shows a vertical transverse section of a complete Wall, with the form in place, and the auxiliary strips disposed at the inner side of the trough-like elements;

Flgure 6 1s a similar view showing the arrangement of auxiliary strips for a slanting baffle, the set of auxiliary strips at the upper side being interlaced with the trough-like elements, and the sides of the troughs being angularly bent in conformity to the angle of slant of the wall;

Figure 6 is a detail perspective view shovying' the interlaced arrangement;

Flgure 7 is a perspective View of the form corresponding to Figure 6; Figure 8 is a perspective view of the form in which the auxiliary strips are placed at the outer side, and backing timbers are used;

Figure 9 is a vertical transverse section showing additional thicker wooden backing strips reinforcing the structure of Figure 8 at the outer side;

Figure lO shows a form constructed with trough-like elements, with the elements diagonally arranged;

Figure 11 is a plan view showing the arrangement of the wooden form, to which the elements are attached;

Figure. 12 is a vertical transverse section;

Figure is a fragmentary perspective View showing the construction of the woodon form;

Figure 14 shows the application of the diagonally arranged trough-like elements, to sectional construction;

Figure 15 is a fragmentary perspective view, further illustrating the diagonal arrangement of the troughs;

Figure 16 is a detail transverse section; and

Figure 17 is a fragmentary perspective of a trough-like element.

Figure 18 illustrates a finished baffle wall slantingly arranged about a set of boiler tubes.

Figure 19 is a transverse section looking at the face of the finished wall.

Figure 20 shows an enlarged detail of the wall of Figure 19 and represents, a modification in which trough-like elements have strips interlaced therewith. 1

Figure 21is a plan section of the construction of Figure 20.

Figure 22 is a fragmentary perspect ve view more clearly showing the form with only part of the baffle wall formed and with some of the tubes removed to more clearly illustrate the construction of Figures 19, 20 and 21, with one of the closed bottom filling troughs, in filling position.

Figure 23 is a transverse section ofthe modified form of trough used in Figures 19, 2O 21 and 22 comprising side strips, connected by cross strips which are spot welded to the side strips.

In Figures 1 to 9, inclusive, the troughlike elements are horizontally interposed between adjacent rows of tubes. As a prelimi nary, a wooden frame is first arranged about the ends and bottom of a brace of tubes 1, the frame members being respectively designated 3, 4L- and 5. The width of the frame pieces is, of course, made substantially equal to the desired thickness of the wall. Each trough-like element is formed from bendable sheet material to provide wall-forming portions 6, connected by narrow transverse 'portions 8, defining a linear series of filler openings, the lateral portions 6 being bent along the margins of the openings, as clearly shown in Figure 3. The spacing of the strips 8 substantially correspond, in this instance, to the center-to-center spacing of the tubes, as shown in dotted lines in Figure 2.

Strips 10 are disposed diagonally with respect to the trough-like elements, and between the tubes in crisscross fashion, and in this instance at the inner sides of and against the walls 6. The outer ends of the strips are bent to form hooks 12, which engage over the upper edges of the uppermost trough like element. The terminals of some of the shorter strips are secured by fastening fdevices to the end frame pieces 3 and 4. The terminals of the trough-like elements are similarly attached, as shown in Figure 1.

As shown in Figure 4, the form is set up for building a portion or section of the wall, and the figure illustrates the arrangement for pouring the last or top section of con crete. This arrangement is used in repair work.

Figure 6 shows the arrangement for the forming of a slanting baffie wall, and, in this instance, one set of auxiliary strips 10 are interlaced with the trough-like elements, the side 6 of said elements being angularly bent in conformity to the angle of slant of the wall. Figure 6 shows more clearly the interlaced arrangement.

Figure 7 shows more in detail an arrangement of the auxiliary elements corresponding to Figure 1, in which the elements 10 are arranged at the inner side of the vertical walls of the horizontally disposed troughlike elements.

It is sometimes desirable to arrange the diagonal strips 10 at the outer side of the trough-like elements, in which case some rein forcement at the outer side of these straps is necessary. In Figure 8 this arrangement of the diagonal strips is shown, and in Figure 9 backng strips 20 have been indicated, rxhich act to reinforce the strips in the manner indicated. Otherwse the construction and arrangement is virtually the same as for the previously cribed set-ups.

The trough elements can, however, be used )Ul' forming a cement container without the of auxiliary strips, and such a use is n in Figure 10. In this instance the trouglrliltc elements are diagonally arranged between the tubes, in crisscross fashion, w th the trough sections of one slant traversing the filler openings of the elements of the other slant. Figures 15 and 16 show this arrangement. in this set-up the wooden frame, comprising the menihers 3, 4 and 5,

placed as in the first instance, but additional fran'ie mcmb 13 are secured at the top on opposite nines of the first mentioned frame, and to the inner sides of these members are secured the upper ends of the diagormlly arranged element 6. Figure 14 shows an arrang meat similar to Figure 4, for building walls in sections, by the use of diagonally disposed trough-like elements alone.

In order to fill the forms after being set up, closed bottom filling troughs as chutes are used, and are adapted to be telescopically inserted within the trough elements of the form to facilitate the introduction and distribution of cement through the filler open ings, to position between the tubes. These troughs here not been shown and nothing is, therefore, claimed for them. The cement could be introduced in other ways, but it will be seen that the construction lends itself to the use of troughs of this kind. In using such troughs the same are first introduced diagonally with their low r ends normally low as ible. and as the filling operation progres tne troughs are drawn outwardly, step by step.

121 Figures 19 to 23 a modified form of the arrangement of the trough-like retaining elements has been shown, in which each element is formed of two strips 30- connected: by a; cross strip 31', which cross strip. has angu- 1311 portions 32 engaging at the outside of the strips 30 these portions being spot welded ten the strips 50. This provides a very cheap construction, over that which is stamped from one piece, as previously described. However, the salient feature of this form is substantially like that of the earlier described form, in that it comprises the spaced parallel retaining walls and the transverse strips connecting and bracing the walls against inward collapse, or outward separation and provides filler openings. This construction of the trough-like element can be used in any environment, but as best shown in Figures 20 and 22. The troughlike elements are arranged diagonally and are practically parallel, and extend in one direction only. The alternate troughs are slightly offset from a line drawn trans- \ersely between the walls 85, and strips 38 are laced as shown. This arrangement of the trough-like elements is somewhat similar to that shown in Figure 15 but in that figure one set of troughs lie within and extend through the other set, and two sets are pro vided. each slanting in an opposite direction, the members of each set, however, being parallel. The cross strips 31 have the same relation as the cross strips of the other forms, and are arranged to allow the uninterrupted introduction of the cement into the form.

The form is set up in substantially the same manner as described for the other forms except that the wooden posts 34 shown in Figure 1 are dispensed with inasmuch as the groove 40 acts to secure the ends of the troughs and strips. The bottom strips 5 can also be dispensed with, but a suitable backing placed at the outside is used to secure the lower ends of the strips and troughs. The supporting strips, of course, remain in the wall. The formation of the trough device from sheet metal and particularly the formation of such a device from strips cheap.

A closed bottom trough is used as shown 4-5 in Figure 22, to facilitate introduction of the wet cement, between the trough-like forms. The trough 45 is telescopically en gaged as shown and may be withdrawn as the filling operation proceeds.

I claim as my invention:

1. A blank for the purpose described, constructed of bendable material, and having a linear series of openings therein separated by narrow transverse portions of the material, and providing a lateral portion of material at opposite sides of the openings, bendable along the margins of the openings to provide upright sides.

2. A trough-like wall-forming element of the nature described, having a linear set of rectangular openings defined and separated by relatively narrow transverse bracing strips, the spacing of the strips corresponding to the center-to-center spacing of the tubes to be embedded, said element having upright side-forming strips laterally of the openings on both sides, as lateral retaining walls.

3. A device of the class described, com prising spaced parallel retaining walls, transverse strips connecting and bracing said walls against inward collapse, and defining the filler openings.

4. A device of the class described, including lateral side-forming and retaining walls, a series of transverse bracing strips connecting said walls, the center-to-center spacing of said transverse strips corresponding to the center-to-center spacing of the tubes, said strips and side Walls defining filler openings permitting the wall-forming material to pass therethrough.

5. A blank for the purpose described, constructed of bendable material, and having a linear series of openings therein separated by narrow transverse portions of the material, and providing a lateral portion of material at opposite sides of the openings, bendable along the margins of the openings to provide upright sides, and closure strips disposed diagonally with respect to the sideforming elements between rows of tubes.

6. A device of the class described, as a form comprising a series of side-forming elements transversely connected by bracing and spacing elements, said spacing elements defining openings to permit gravity distribution of wet cement therethrough, and said side-forming elements disposed between rows of tubes and providing troughlike structures, arranged to permit telescopic introduction of filling troughs, for obtaining even distribution of wet cement through all openings of all elements.

7. A skeleton structural form for the purpose described, which comprises a series of trough-like elements disposed between adjacent rows of tubes, each element having sides spaced in correspondence to the desired thickness of the wall, with each side of a width substantially equal to the distance between the tubes, and said sides connected crosswise by narrow strips, defining spaces between the strips and providing filler openings, and said strips acting to brace the sides against transverse collapse.

8. A skeleton structural form for the pm pose described, which comprises a series of trough-like elements disposed between adiacent rows of tubes, each element having sides spaced in correspondence to the desired thickness of the wall, with each side of a width substantially equal to the distance between the tubes, and said sides connected crosswise by narrow strips, defining spaces between the strips and providing filler openings, and said strips acting to brace the sides against transverse collapse, and strips disposed diagonally with respect to the trough like elements in crisscross fashion also between adjacent rows of tubes adjacent opposite sides of the first mentioned elements, said diagonal strips and said elements terminally secured to a form surrounding the tubes.

9. In combination with a series of spaced tubes, of trough-like elements interposed between the tubes, and having wall-forming members and cross-bracing members, defining filler openings, arranged to permit introduction of wet concrete between the tubes.

In witness whereof, I have hereunto set my hand this 22nd day of November, 1926.

MICHAEL LIPTAK. 

